Posts Tagged ‘blur’

Well, not really but I thought it was cool title. Took this shot last night on the way home from the East Bay. That’s the wife driving, by the way. This was taken in the tunnel going through Treasure Island that leads to the upper deck of the Bay Bridge’s main span.

I have a second shot taken on the actual main span that looks really cool too. Check it out on my flickr page!

I’m extremely excited to have received my brand new Tamron 17-50mm f/2.8 VC. VC, or Vibration Control, is Tamron’s version of optical image stabilization, which compensates for camera shake while taking photos, allowing more flexibility in low light photography. I previously owned the non-stabilized version of the Tamron 17-50mm, which I sold my cousin in order to nab this one. So, as a former owner of the last lens, there are some differences other than the new VC feature that I can note between this updated version and the older Tamron 17-50.

First of all, this new VC version seems very slightly larger and heavier, but the difference is hard to really feel in practice. To me, the construction/build quality of the lens looks and feels superior to the older Tamron, though still not as rugged as my Tokina 11-16mm f/2.8. The VC lens also takes 72mm filters instead of the 67mm ring size of the older lens, which means I’m gonna have to go filter shopping now.

My new Tamron seems to make lots of interesting noises during shooting. First of all, while the zoom ring operated quietly on the older 17-50, the zoom ring on the VC version makes a strange sound that I can’t seem to describe any other way than as the sound of zipping up the zipper on a camping tent. Not sure if that description makes any sense, but the sound doesn’t really bother me and may fade in time. Focusing sounds are noisy like the older lens, and while this lens seems to focus very fast on my D300s (I never had a chance to mount the old one on my new camera), the noise that the non-silent wave motor makes during operation seems similar to the old one: noisy, but not objectionably so in my opinion. Then, of course, there is the noise coming from the VC system. You know the sound that a conch makes when you put your ear up to it? Yeah, kinda sounds like that.

About the VC system. I’m used to using optical stabilization on my longer Nikkor 70-300mm lens, where hand holding the lens racked out at 300mm and activating VR reduces the shake in the viewfinder significantly but not completely. When I look through the viewfinder with the Tamron mounted and VC active at these shorter focal lengths, the image in the viewfinder looks dead still….like scary still. It’s pretty awesome.

While out on the town this evening I decided to do a little practical test of the VC’s effectiveness. Here’s a shot I took on a tripod tonight with the new lens:

Nikon D300s + Tamron 17-50mm f/2.8 VC at 18mm f/18, 8 Seconds ISO200

During the same shooting session, I took two shots from the same spot, but hand-held. One shot was taken with VC active and one without. Here’s a crop from each (cropped from the center window on the Castro Theater). Both these images were shot in RAW and converted to JPEG in Adobe Lightroom without any adjustments made. Note the camera settings in each shot:

I made a little mistake in this test that actually made it turn out a little better in a way. Notice that the settings are identical in each shot except for the ISO settings. The non-VC shot is set at ISO800 while the VC shot is at ISO500. This is because when I took the camera off the tripod to start shooting hand-held, I instinctively set the camera to auto-ISO, so the camera started changing the ISO from one shot to the other (auto ISO effected not only by what the meter is seeing but also by whether or not VC is active). If I had manually kept the ISO the same in both shots, the blur in the non VC shot would have been more exaggerated.

But as you can see, even with a higher ISO sensitivity, the shot with VC off shows significant blur from camera motion compared to the shot with VC on at a lower sensitivity setting. These shots were taken at a pretty small aperture considering they were both taken at dusk, and the fact that the shot with VC was sharp down to 1/8 of a second combined with a pretty low ISO in this case is really promising. For static, low-light subjects (which make up a lot of the shots I take), the optical stabilization will allow me to take more usable photos when I don’t have a tripod. The VC will also give me more usable apertures in low-light, which is great if I decide I want more depth of field or sharpness in a hand-held low-light shot, rather than having to resort cranking up the ISO, shooting at f/2.8, and hoping the shutter speed is high enough to stop the shake.

Here’s the non-cropped version of the hand-held photo of the Castro Theater with VC active:

Nikon D300s + Tamron 17-50 f/2.8 VC at 20mm f/8, 1/8 Second ISO 500

Overall I really look forward to using this Tamron. My favorite lens has still got to be my Tokina 11-16 f/2.8, but this one will probably come to be a very close second, and will probably be on my camera 90% of the time I shoot. Well, I don’t know about 90%…..we’ll just have to see!

Update 11/20/09:

Check out a few shots I took at a recent wedding with the Tamron 17-50 VC here.

Check out more hand held low light shots at a museum with the Tamron here.

Or, just click the 70-50 tag to see all the photos I’ve taken so far with the Tamron 17-50 VC.